diff --git a/buildroot/buildroot-dev.patch b/buildroot/buildroot-dev.patch
index 50c37e9d..cdf4aad0 100644
--- a/buildroot/buildroot-dev.patch
+++ b/buildroot/buildroot-dev.patch
@@ -130,3 +130,14 @@ diff -urb buildroot-dev/utils/scanpypi brdev-working/utils/scanpypi
  """
  
  Utility for building Buildroot packages for existing PyPI packages
+--- buildroot-dev/package/rpi-firmware/rpi-firmware.mk	2020-03-30 08:34:17.762664308 +0000
++++ buildroot-dev/package/rpi-firmware/rpi-firmware.mk	2020-03-30 09:07:44.410958163 +0000
+@@ -4,7 +4,7 @@
+ #
+ ################################################################################
+
+-RPI_FIRMWARE_VERSION = 01ecfd2ba2b7cf3a2f4aa75ada895ee4a3e729f5
++RPI_FIRMWARE_VERSION = 5574077183389cd4c65077ba18b59144ed6ccd6d
+ RPI_FIRMWARE_SITE = $(call github,raspberrypi,firmware,$(RPI_FIRMWARE_VERSION))
+ RPI_FIRMWARE_LICENSE = BSD-3-Clause
+ RPI_FIRMWARE_LICENSE_FILES = boot/LICENCE.broadcom
diff --git a/buildroot/package/configtxt/configtxt.mk b/buildroot/package/configtxt/configtxt.mk
index 3af8cc6c..19b61496 100644
--- a/buildroot/package/configtxt/configtxt.mk
+++ b/buildroot/package/configtxt/configtxt.mk
@@ -8,6 +8,8 @@ define CONFIGTXT_INSTALL_TARGET_CMDS
         echo "# Enable I2C and SPI" >> $(BINARIES_DIR)/rpi-firmware/config.txt
 	echo "dtparam=i2c=on" >> $(BINARIES_DIR)/rpi-firmware/config.txt
 	echo "dtparam=spi=on" >> $(BINARIES_DIR)/rpi-firmware/config.txt
+	echo "# Workaround force_eeprom_read" >> $(BINARIES_DIR)/rpi-firmware/config.txt
+	echo "force_eeprom_read=0" >> $(BINARIES_DIR)/rpi-firmware/config.txt
 endef
 
 define CONFIGTXT_QUIET_INSTALL_TARGET_CMDS
diff --git a/buildroot/package/hifiberry-tools/Config.in b/buildroot/package/hifiberry-tools/Config.in
index cf81211a..d418a518 100644
--- a/buildroot/package/hifiberry-tools/Config.in
+++ b/buildroot/package/hifiberry-tools/Config.in
@@ -10,7 +10,8 @@ config BR2_PACKAGE_HIFIBERRY_TOOLS
         select BR2_PACKAGE_LINUX_TOOLS_PERF
 	select BR2_PACKAGE_LINUX_TOOLS_PERF_TUI
 	select BR2_PACKAGE_JQ
-	select BR2_PACKAGE_RNG_TOOL
+	select BR2_PACKAGE_RNG_TOOLS
+	select BR2_PACKAGE_ZIP
 
 config BR2_PACKAGE_HIFIBERRY_TOOLS_AUDIO_LITE
         bool "audio lite mode (for Pi 0)"
diff --git a/buildroot/package/hifiberry-tools/detect-hifiberry b/buildroot/package/hifiberry-tools/detect-hifiberry
index 07505418..40ac23a3 100755
--- a/buildroot/package/hifiberry-tools/detect-hifiberry
+++ b/buildroot/package/hifiberry-tools/detect-hifiberry
@@ -70,12 +70,21 @@ if [ "$FOUND" == "" ]; then
  echo "No HiFiBerry card configured, try to probe using I2C" >> /var/log/hifiberry.log
 
  echo "Mounting /boot"
- mount /boot
+ mount -o remount,rw /boot
  if [ ! -f /boot/config.txt ]; then
    echo "couldn't mount FAT file system, aborting card detection" >> /var/log/hifiberry.log
    exit 1
  fi
 
+ echo "Detecting force_eeprom_read"
+ FORCEEEPROM=`cat /boot/config.txt | grep force_eeprom_read`
+ if [ "$FORCEEEPROM" != "" ]; then
+   cat /boot/config.txt | grep -v force_eeprom_read > /tmp/config.txt
+   cp /boot/config.txt /boot/config.txt.bak
+   cp /tmp/config.txt /boot/config.txt
+   sync
+ fi
+
  echo "Detecting using I2C" 
  check_i2c
  card=$(detect_card)
diff --git a/buildroot/package/hifiberry-tools/reconfigure-players b/buildroot/package/hifiberry-tools/reconfigure-players
index 5e345b3b..ba9239ba 100755
--- a/buildroot/package/hifiberry-tools/reconfigure-players
+++ b/buildroot/package/hifiberry-tools/reconfigure-players
@@ -215,13 +215,13 @@ guess_card() {
    return
  fi
 
- DIGIPRO=`aplay -l | grep Digi+ | grep Pro`
+ DIGIPRO=`aplay -l | grep Digi | grep Pro`
  if [ "$DIGIPRO" != "" ]; then
    CARD="Digi+ Pro"
    return
  fi
 
- DIGI=`aplay -l | grep Digi+`
+ DIGI=`aplay -l | grep Digi`
  if [ "$DIGI" != "" ]; then
    CARD="Digi+"
     return
diff --git a/buildroot/package/hifiberry-updater/Config.in b/buildroot/package/hifiberry-updater/Config.in
index 19b36e0a..cfeaf0b3 100644
--- a/buildroot/package/hifiberry-updater/Config.in
+++ b/buildroot/package/hifiberry-updater/Config.in
@@ -2,6 +2,7 @@ config BR2_PACKAGE_HIFIBERRY_UPDATER
 	bool "hifiberry-updater"
         help
 	  "Update tools for HiFiBerryOS"
+	depends on BR2_PACKAGE_RPI_FIRMWARE
 	select BR2_PACKAGE_E2FSPROGS
 	select BR2_PACKAGE_E2FSPROGS_RESIZE2FS
 	select BR2_PACKAGE_LIBCURL
diff --git a/buildroot/package/hifiberry-updater/hifiberry-updater.mk b/buildroot/package/hifiberry-updater/hifiberry-updater.mk
index 6ef59578..9e0e1da2 100644
--- a/buildroot/package/hifiberry-updater/hifiberry-updater.mk
+++ b/buildroot/package/hifiberry-updater/hifiberry-updater.mk
@@ -11,8 +11,12 @@ define HIFIBERRY_UPDATER_INSTALL_TARGET_CMDS
                 $(TARGET_DIR)/opt/hifiberry/bin
 	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL_HIFIBERRY_PATH)/package/hifiberry-updater/extract-update \
                 $(TARGET_DIR)/opt/hifiberry/bin
+	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL_HIFIBERRY_PATH)/package/hifiberry-updater/update-firmware \
+		$(TARGET_DIR)/opt/hifiberry/bin
         $(INSTALL) -D -m 0755 $(BR2_EXTERNAL_HIFIBERRY_PATH)/package/hifiberry-updater/partitions \
                 $(TARGET_DIR)/opt/hifiberry/bin
+	$(INSTALL) -D -m 0755 $(BR2_EXTERNAL_HIFIBERRY_PATH)/package/hifiberry-updater/reactivate-previous-release \
+		$(TARGET_DIR)/opt/hifiberry/bin
         $(INSTALL) -D -m 0444 $(BR2_EXTERNAL_HIFIBERRY_PATH)/VERSION \
                 $(TARGET_DIR)/etc/hifiberry.version
         $(INSTALL) -D -m 0444 $(BR2_EXTERNAL_HIFIBERRY_PATH)/PIVERSION \
@@ -33,4 +37,33 @@ endef
 define HIFIBERRY_UPDATER_INSTALL_INIT_SYSTEMD
 endef
 
+### 
+### Add more functions to RPI firmware
+###
+ifeq ($(BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4),y)
+define RPI_INSTALL_FIRMWARE
+        echo "Pi 4"
+        $(INSTALL) -D -m 0644 $(@D)/boot/start4$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).elf $(TARGET_DIR)/usr/lib/firmware/rpi/start4.elf
+        $(INSTALL) -D -m 0644 $(@D)/boot/fixup4$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).dat $(TARGET_DIR)/usr/lib/firmware/rpi/fixup4.dat
+
+endef
+else
+define RPI_INSTALL_FIRMWARE
+        echo "Pi < 4"
+        $(INSTALL) -D -m 0644 $(@D)/boot/start$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).elf $(TARGET_DIR)/usr/lib/firmware/rpi/start.elf
+        $(INSTALL) -D -m 0644 $(@D)/boot/fixup$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).dat $(TARGET_DIR)/usr/lib/firmware/rpi/fixup.dat
+
+endef
+endif
+
+define RPI_INSTALL_OVERLAYS
+        echo "Installing overlays"
+        for ovldtb in $(@D)/boot/overlays/*.dtbo; do \
+                $(INSTALL) -D -m 0644 $${ovldtb} $(TARGET_DIR)/usr/lib/firmware/rpi/overlays/$${ovldtb##*/} || exit 1; \
+        done
+endef
+
+RPI_FIRMWARE_INSTALL_TARGET_CMDS += $(RPI_INSTALL_FIRMWARE)
+RPI_FIRMWARE_INSTALL_TARGET_CMDS += $(RPI_INSTALL_OVERLAYS)
+
 $(eval $(generic-package))
diff --git a/buildroot/package/hifiberry-updater/reactivate-previous-release b/buildroot/package/hifiberry-updater/reactivate-previous-release
new file mode 100644
index 00000000..a4ffff1f
--- /dev/null
+++ b/buildroot/package/hifiberry-updater/reactivate-previous-release
@@ -0,0 +1,35 @@
+#!/bin/bash
+PART=`/opt/hifiberry/bin/partitions | awk '{print $2}'`
+if [ ! -f /boot/zImage.bak ]; then
+ echo "No previous release found, aborting..."
+ exit 1
+fi
+if [ "$PART" == "/dev/mmcblk0p3" ]; then
+ P=$PART
+fi
+if [ "$PART" == "/dev/mmcblk0p2" ]; then
+ P=$PART
+fi
+
+if [ "$P" == "" ]; then
+ echo "Unknown backup partition $PART, aborting..."
+ exit 1
+fi
+
+mount -o remount,rw /boot
+echo "activating $P"
+echo "root=$P rootwait console=tty5 systemd.show_status=0 quiet splash" > /boot/cmdline.txt
+mv /boot/zImage.bak /boot/zImage
+umount /newroot 2>/dev/null
+if [ ! -d /oldroot ]; then
+  mkdir /oldroot
+fi
+mount $P /oldroot
+# Disable automatic updates
+echo > /etc/updater.release
+umount /oldroot
+
+sync
+reboot
+
+
diff --git a/buildroot/package/hifiberry-updater/update-firmware b/buildroot/package/hifiberry-updater/update-firmware
new file mode 100644
index 00000000..14474532
--- /dev/null
+++ b/buildroot/package/hifiberry-updater/update-firmware
@@ -0,0 +1,5 @@
+#!/bin/bash
+mount -o remount,rw /boot
+cp -rv /usr/lib/firmware/rpi/* /boot
+sync
+reboot
diff --git a/buildroot/package/raat/configure-raat b/buildroot/package/raat/configure-raat
index 7b9fbd63..66894ecd 100644
--- a/buildroot/package/raat/configure-raat
+++ b/buildroot/package/raat/configure-raat
@@ -44,7 +44,7 @@ elif [ "$CARD" == "Digi+" ]; then
  if [ "$DIGIFIXED" == "1" ]; then
    VOLCTL=""
  else
-   VOLCTL='"volume": { "type": "alsa", "name": "softvol", "device": "default" },'
+   VOLCTL='"volume": { "type": "alsa", "optional": "false", "device":"default", "index":0, "name":"Softvol" },'
  fi
  # DOP not supported on HiFiBerryOS
  DSD=""
diff --git a/configs/hifiberryos b/configs/hifiberryos
index b0c02c06..1bc9eb30 100644
--- a/configs/hifiberryos
+++ b/configs/hifiberryos
@@ -42,10 +42,13 @@ BR2_arm=y
 # BR2_x86_64 is not set
 # BR2_xtensa is not set
 BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9=y
+BR2_ARCH_NEEDS_GCC_AT_LEAST_5=y
 BR2_ARCH="arm"
 BR2_ENDIAN="LITTLE"
 BR2_GCC_TARGET_ABI="aapcs-linux"
-BR2_GCC_TARGET_CPU="cortex-a53"
+BR2_GCC_TARGET_CPU="cortex-a72"
 BR2_GCC_TARGET_FPU="neon-vfpv4"
 BR2_GCC_TARGET_FLOAT_ABI="hard"
 BR2_GCC_TARGET_MODE="arm"
@@ -112,10 +115,10 @@ BR2_ARM_CPU_ARMV8A=y
 #
 # BR2_cortex_a32 is not set
 # BR2_cortex_a35 is not set
-BR2_cortex_a53=y
+# BR2_cortex_a53 is not set
 # BR2_cortex_a57 is not set
 # BR2_cortex_a57_a53 is not set
-# BR2_cortex_a72 is not set
+BR2_cortex_a72=y
 # BR2_cortex_a72_a53 is not set
 # BR2_cortex_a73 is not set
 # BR2_cortex_a73_a35 is not set
@@ -171,7 +174,7 @@ BR2_BZCAT="bzcat"
 BR2_XZCAT="xzcat"
 BR2_LZCAT="lzip -d -c"
 BR2_TAR_OPTIONS=""
-BR2_DEFCONFIG="/home/matuschd/buildroot-2019.08-rc3/configs/raspberrypi3_defconfig"
+BR2_DEFCONFIG="/home/matuschd/buildroot-2019.08-rc3/configs/raspberrypi4_defconfig"
 BR2_DL_DIR="$(TOPDIR)/dl"
 BR2_HOST_DIR="$(BASE_DIR)/host"
 
@@ -479,9 +482,9 @@ BR2_TARGET_TZ_ZONELIST="default"
 BR2_TARGET_LOCALTIME="Etc/UTC"
 BR2_ROOTFS_USERS_TABLES=""
 BR2_ROOTFS_OVERLAY="../hifiberry-os/buildroot/board/raspberrypi3/overlay/"
-BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi3/post-build.sh"
+BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi4/post-build.sh"
 BR2_ROOTFS_POST_FAKEROOT_SCRIPT=""
-BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi3/post-image.sh"
+BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi4/post-image.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="--add-miniuart-bt-overlay"
 
 #
@@ -496,13 +499,13 @@ BR2_LINUX_KERNEL_CUSTOM_TARBALL=y
 # BR2_LINUX_KERNEL_CUSTOM_GIT is not set
 # BR2_LINUX_KERNEL_CUSTOM_HG is not set
 # BR2_LINUX_KERNEL_CUSTOM_SVN is not set
-BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,64d0a9870ac14d5eb5253f67d984ae348eec1393)/linux-64d0a9870ac14d5eb5253f67d984ae348eec1393.tar.gz"
+BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION="$(call github,raspberrypi,linux,64d0a9870ac14d5eb5253f67d984ae348eec1393)/64d0a9870ac14d5eb5253f67d984ae348eec1393.tar.gz"
 BR2_LINUX_KERNEL_VERSION="custom"
 BR2_LINUX_KERNEL_PATCH=""
 BR2_LINUX_KERNEL_USE_DEFCONFIG=y
 # BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG is not set
 # BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG is not set
-BR2_LINUX_KERNEL_DEFCONFIG="bcm2709"
+BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
 BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=""
 BR2_LINUX_KERNEL_CUSTOM_LOGO_PATH=""
 # BR2_LINUX_KERNEL_UIMAGE is not set
@@ -518,7 +521,7 @@ BR2_LINUX_KERNEL_GZIP=y
 # BR2_LINUX_KERNEL_XZ is not set
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 # BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT is not set
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2710-rpi-3-b bcm2710-rpi-3-b-plus bcm2710-rpi-cm3"
+BR2_LINUX_KERNEL_INTREE_DTS_NAME="bcm2711-rpi-4-b"
 BR2_LINUX_KERNEL_CUSTOM_DTS_PATH=""
 # BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT is not set
 # BR2_LINUX_KERNEL_INSTALL_TARGET is not set
@@ -944,7 +947,7 @@ BR2_PACKAGE_BZIP2=y
 # BR2_PACKAGE_UNRAR is not set
 # BR2_PACKAGE_UNZIP is not set
 # BR2_PACKAGE_XZ is not set
-# BR2_PACKAGE_ZIP is not set
+BR2_PACKAGE_ZIP=y
 # BR2_PACKAGE_ZSTD is not set
 
 #
@@ -1257,8 +1260,8 @@ BR2_PACKAGE_QT5_JSCORE_AVAILABLE=y
 # BR2_PACKAGE_MURATA_CYW_FW is not set
 BR2_PACKAGE_RPI_BT_FIRMWARE=y
 BR2_PACKAGE_RPI_FIRMWARE=y
-BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI=y
-# BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4 is not set
+# BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI is not set
+BR2_PACKAGE_RPI_FIRMWARE_VARIANT_PI4=y
 BR2_PACKAGE_RPI_FIRMWARE_DEFAULT=y
 # BR2_PACKAGE_RPI_FIRMWARE_X is not set
 # BR2_PACKAGE_RPI_FIRMWARE_CD is not set
@@ -1286,8 +1289,6 @@ BR2_PACKAGE_RPI_WIFI_FIRMWARE=y
 # BR2_PACKAGE_CBOOTIMAGE is not set
 # BR2_PACKAGE_CC_TOOL is not set
 # BR2_PACKAGE_CDRKIT is not set
-BR2_PACKAGE_CPUBURN_ARM_ARCH_SUPPORTS=y
-# BR2_PACKAGE_CPUBURN_ARM is not set
 # BR2_PACKAGE_CRYPTSETUP is not set
 # BR2_PACKAGE_CWIID is not set
 # BR2_PACKAGE_DAHDI_LINUX is not set
@@ -1373,9 +1374,9 @@ BR2_PACKAGE_PARTED=y
 # BR2_PACKAGE_POWERTOP is not set
 # BR2_PACKAGE_PPS_TOOLS is not set
 # BR2_PACKAGE_PRU_SOFTWARE_SUPPORT is not set
-# BR2_PACKAGE_RASPI_GPIO is not set
+BR2_PACKAGE_RASPI_GPIO=y
 # BR2_PACKAGE_READ_EDID is not set
-# BR2_PACKAGE_RNG_TOOLS is not set
+BR2_PACKAGE_RNG_TOOLS=y
 # BR2_PACKAGE_RPI_USERLAND is not set
 # BR2_PACKAGE_RS485CONF is not set
 # BR2_PACKAGE_RTC_TOOLS is not set
@@ -2024,7 +2025,7 @@ BR2_PACKAGE_LIBCONFIG=y
 # BR2_PACKAGE_LIBFUSE is not set
 BR2_PACKAGE_LIBLOCKFILE=y
 # BR2_PACKAGE_LIBNFS is not set
-# BR2_PACKAGE_LIBSYSFS is not set
+BR2_PACKAGE_LIBSYSFS=y
 # BR2_PACKAGE_LOCKDEV is not set
 # BR2_PACKAGE_PHYSFS is not set
 
@@ -2199,7 +2200,7 @@ BR2_PACKAGE_GNU_EFI_ARCH_SUPPORTS=y
 # BR2_PACKAGE_GNU_EFI is not set
 # BR2_PACKAGE_HACKRF is not set
 # BR2_PACKAGE_HIDAPI is not set
-# BR2_PACKAGE_JITTERENTROPY_LIBRARY is not set
+BR2_PACKAGE_JITTERENTROPY_LIBRARY=y
 # BR2_PACKAGE_LCDAPI is not set
 # BR2_PACKAGE_LET_ME_CREATE is not set
 # BR2_PACKAGE_LIBAIO is not set
@@ -4309,3 +4310,4 @@ HIFIBERRY_TEST_NONE=y
 # HIFIBERRY_TEST_DACADCPRO is not set
 # HIFIBERRY_TEST_DSPDACADC is not set
 # HIFIBERRY_TEST_USB is not set
+# BR2_PACKAGE_CPUBURN_ARM is not set